Ventilating and other fan.



H. J. TRAUTMANN & J. L. GOPPING.

VENTILATING AND OTHER FAN. v APPLIOATIONIiLED MABJI, 191s. f

' Patented May 26, 1914.

2 SHEETS-SHEET 1.

H. J TRAUTMANN & J.L. GOPPING.

VENTILATING AND OTHER FAN.

APPLICATION FILED MAB. 7} 1913.

Patented May 26, 1914.

2 SHEETS-SHEET 2.

UNITED- STATES PATENT OFFICE.

HENRY JULIUS TRAUTMANN AND ZI'AlVlI'ES LLOYD COPPING, OF LONDON, ENGLAND. v

VENTILATING AND OTH R FAN.

Specification of Letters Patent.

Patented May 26, 1914.

Application filed March 7, 1913. Serial No. 752,705.

To all whom it may concern:

Be it known that we, HENRY JULIUS A TRAUTMANN and JAMES LLOYD COPPING,

subjects of the King of England, residing at London, England, have invented certain new and useful Improvements in Ventilating and other Fans, of which the following is a specification.

This invention is for improvements in or relating to ventilating and other fans. As

is well-known it is not always desired that a fan shall send a current of air-continuously in one direction and for this reason fans have been constructed which can automatically swing about or rotate around a vertical axis while propelling a current of air in an approximately horizontal direction.

According to the present invention, pro- 'vision is made in a power-driven fan of means for automatically reversing it or of means for causing it to create lntermittent air blasts in. one direction only. If desired,-

. during. running to-give either of the efi'ects referred to above.

The operating mechanism or striking gear for changing the angle of the blades, may include means for driving the blade-carrying member at a diflerent speed from that ofthe driving-spindle, such difierence of speed being utilized to determine the intervals at which the angle of the blades shall be changed. The diiference of speed may be eflected by a friction-drive being'provided between the driving-spindle and the blade-hub which permits relative slip. In the accompanying drawings which illustrate one method of carrying out this inventionE-Figure 1 is a side elevation of that part of the fan which concerns the present invention; Fig. 2 shows the same mechanism viewed from the right of Fig. 1; Fig. 3 is a section on the line 3-3 of Fig. 2, and Fig. 4 is a view of the fan seen from the left of Fig. 1 with part in section.

Like letters indicate like parts throughout the drawings. The driving-shaft A may be continuously driven by an electric motor or from any Other source of power not shown 1n the drawings, and as lLhlS'lS usually somewhat short as made for electric fans, it is lengthened for the purpose of this invention by securing to it an extension tube A This tube has a flange or collar A on the motor side which is rigidly secured to the shaft by one or more set-screws A Mounted concentrically with the extension tube A is a sleeve B constituting the bladecarrying hub and having an internal flange b. The hub has anexternal flange b and radially disposed thereon are three tubular sockets B in each of which is rotatably mounted a stem B carrying a blade B The sockets B overhang the flange b at B and beneath these overhanging portions pins B project one from each stem B A washer B provides a bearing between each pin and the base of the socket. Free to move angularly on'the hub B is a ring C composed of several loose rings placed face to face and it is provided with three holes which accommodate the pins B of the blade stems; the three blade stems are thus, operativelyconnected together. The ring 0 is kept in place by a wire ring C which is sprung into a groove in the hub.

By makingup the ring of separate loose rings the wear of the holes which accommodate the pins is decreased. On the hub B a bearing D is provided for a spindle D which carries at one end a star-wheel D and at the other end a worm D The same hub-member provides a bearing or pivotal support for a worm-wheel D which meshes with the worm D and carries on its face acrank-pin D which is bent over to constitute a link whereof the end engages an adjustable stud comprising a base D and a screw D One of the pins B of the blade stems B is extended to constitute an operating arm E having two extreme positions E, E respectively for the stud D, D Projecting from that face ofthe fixed flange A (that is, fixed relatively to the shaft A) which is toward the motor, are two operating pins A for the wheel D Between the flange A and the flange b of the hub B a leather washer G is introduced. A spring G is also inclosed between the hub B and extension A and has one end bearing against the inter-' side of which flange bears against the leather washer G. The vother end of the spring bears against a leather sleeve G which is threaded on the extension A and beyond this is a metal sleeve and coverplate G The end of the extension A has a screw-threaded projection A which extends through the cover-plate and receives lock-nuts G The 0 eration of this device is as follows he driving shaft A is continuously rotated and carries around with it the extension A which is fast on it. This in turn carries around the blade-hub B and the blades thereon, but as the hub B is'not fast tothe extension A but is only driven therefrom by friction it can be arranged to slip continuously relatively to the shaft. The degree of friction is for this purpose regu-- lated by the lock-nuts G By screwing these farther home the parts G3 are pushed in against the leather sleeve G and throu h the medium of this leather sleeve and t e spring G exerts a thrust against the internal flange b and thereby forces the hub B bodily up against the leather washer G which is restrained against endwise movement by the flange A". Conversely by. slacking the screw the parts work more loosely .and thus the friction can be decreased. By

this simple meanstherefore the'speed of the hub relatively to the driving shaft can be varied at will. As the hub lags behind the driving shaft, the pins A on the flange A fast to the shaft A, will cause the star-wheel D to advance one tooth at each half revolution of the shaft relatively to the hub, and thus the worm ID will rotate the wormwheel Dtwhich carries the crank-pin I). When the crank-pin is in the position shown in Fig. l and the link is connected to the arm E at E the arm E is at the central or neutral position of its travel. The arm being an extension of one of the pins B thus holds the stem 13 of the blade to which'it is connected in the central position, so that the blades are set in the neutral position, that is in line with theplane of rotation and create no blast. Allthe blades being connected together by the pins D engaging thelaminated' rin ;Cr, movement of one blade will move a1. It thus follows that as the worm-wheel continues to rotate and the pin 1) is brought, say down to the bottom position in Fig. 1, the arm E will be swung over to the limit of its movement in a counter -clockwise direction as viewed in the same figure, and the blades will thus be turned to. the full blastposition. The continued-movement of the wheel D will bring the crank-pin D to the opposite side of the wheel from that which it occupics in Fig. 1 and the arm E will once again be thus brought to theneutral position and the fan will deliver no blast, The further 5 movement of the wheel Dbrmgsthe pin to messes over to the limit of its movement in a clock-- wise direction. The blades are now turned into position for delivering a blast in the reverse direction to that which they delivered when the arm E was moved to the limit of its travel in a counter-clockwise direction, and thus the fan hasin the meantime first given a blast in one direction, then become inoperative, and finally delivered a blast in the reverse direction. This cycle of operations is continued automatically as long as the driving shaft A is kept in rotation and the interval between one blast and its reversal can be varied at will by tightening or loosening the lock-nuts G*. If now the link D instead of being connected to the arm E at E is connected to it at E by shifting the stud D D, the fan instead of being reversed will only be rendered intermittent as the link is, only sufficiently long to bring the arm E to the neutral position when connected at E, as shown by dotted lines in Fig. l. The stud D, D is arranged to be easily shifted in any convenient manner not needing theuse of any special tool so that the user can at'will easily make the change and thus convert the reversing fan into one which delivers intermittent blasts in the one direction only.- It will be observed that by removing the lock-nuts G the hub B with all its attached and contained parts can be removed from the extension A of the driving-shaft A.

What we claim as our invention and desire to secure by Letters Patent is g 1. A fan provided with blades mounted to turn about axes radial to the supporting member, intermittently-operated means for actuating the blades to turn about said axes and means for controlling th frequency of operation of said first-named means.

2. A fan provided with blades. mounted to turn about axes radial to the supporting member, means for actuating the blades to turn about said axes, means for controllin the action of said first-named means, an means associated with said first-named means for varying the degree of movement of said bladesn 3. In a power-driven fan, the combination of a fan element comprising a rotatable shaft having a series of blades arranged radially around it, each set obliquely to the axis of rotation of the shaft, means for rotating the fan element about the axis of its shaft so that one face of each blade is driven forward against the air and impels the air from one side of the fan element in a direction approximately at right angles to the plane in which the blades travel, a device preventing discharge of air from this side of the fan element, and means for automatically operating the said device after a given number of complete revolutions of the fan element.

4. In a power-driven fan, the combination of a fan element comprising arotatable shaft having a series of blades arranged radially around it, each set obliquely to the axis of rotation of the shaft, means for rotating the fan element about the axis of its shaft so that one face of each blade is driven forward against the air and impels the air from one side of the fan element in a direction approximately at right angles to the plane in which the blades travel, a device for reversing the efiective operation of the fan element so that the air is driven from the blades in a direction opposite to that in which it was driven before the reversing mechanism was operated, and means for automatically operating the said device after a given number of complete revolutions of the fan element.

5. In a power-driven fan the combination of,'a driving-shaft which is rotated continuously in one direction, blades for the fan which are pivoted to'turn about axes radial to their supporting member, and means for automatically oscillating the blades about these axes to change their angle relatively to the plane of rotation during running, for the. purpose described.

6. In a power-driven fan the combination of, a driving-shaft which is rotated continuously in one direction, a bladecarrying member driven thereby at a different speed, the blades being pivoted to turn about axes radial to such member, and means for oscillating the blades about these axes to change their angle relatively to the plane of rotation during running, such means being operated by the relative movement of the driving-shaft and blade-carrying member, for the purpose described- 7. In av power-driven fan the combination of, a driving-shaft which is rotated continuously in one direction, a blade-carrying member driven frictionally from said shaft but in such manner as to permit slip during driving so that the speed of the blade-carrying member is not the same as that of the shaft, the blades moreover being free to pivot about axes radial to their carryingmember, and means for oscillating the blades about these axes to change theirangle relatively to the plane of rotation during running, such means being operated by the relative movement of the driving-shaft and blade-carrying member.

8. In a p wer-driven fan, the combination of, a driving-shaft which is rotated continuously in one direction, ablade carrying member driven thereby at a difi'erent speed, the blades being pivoted to turn about axes radial to such member, a star-wheel mounted on one of these rotating members, a driving-pin mounted on the other member in such position that the relative movement of the two-members will cause the pin to drive the star-wheel, and means operatively connecting the star-wheel to the blades in such manner that rotation of the wheel oscillates the'blades abouttheir pivots, for the purpose described.

9. In a power-driven fan, the combination of, a driving-shaft which is rotated continuously in one direction, a blade-carrying member driven thereby at a diiferent speed, the'blades being pivoted to turn about axes radial to such member, a starwheel mounted on one of. these rotating members, a driving-pin mounted on the other member in such position that the relative movement of'the' two members will cause the pin to drive the star-wheel, and a link pivoted at one end to a member rotated by the star-wheel at a point-"eccentric to the axis of rotation of said memberand at the other end to a member whereby the blades can be oscillated about their radial axes, for the purpose described.

10. In a power-driven fan the combination of a driving-shaft which is rotated continuously in one direction, a blade-carrying member driven thereby at a different speed, the blades being pivoted to turn about axes radial to such member, a star-wheel mounted on one of these rotating members, a driving-pin mounted on the other member in such position that therelative movement of the two members will cause the pin to drive the star-Wheel, a" link pivoted at one end to a member rotated by the star-wheel at a point eccentric to the axis of rotation of said member, an arm operatively connectod with the blades to oscillate. them about their axes of pivoting, and means for operatively connecting the other end of the link to this arm at different points according to the throw required to be given 1t,, for the purpose described.

11. In a power-driven fan the combination of, a driving-shaft which is rotated continuously in one direction, a blade-carrying member driven thereby at a different speed, the blades being pivoted to turn about axes radial to such member, a star-wheel mounted on one of these rotating members, a pin mounted onthe other -member in such position that the relative-movement of the two members will cause the pin to drive the star-wheel, a link pivoted at one end to a member rotated by the star-wheel at a point eccentric to the axis of rotation of said member, arms projecting laterally one from each of the blades, means for operatively connecting the other end of the links to one of these arms at different points according to the throw required to be given it. and a ring mounted concentrically with the blade-carrying memberand having perforations in it which receive the aforesaid arms on the blades whereby they are all interconnected, for the purpose described. 12. In a power-driven fan the combination of, a driving-shaft which is rotated continuously in one direction, a blade-carrying member driven thereby at a different speed, the blades being pivoted to turn about axes radial to such member, a star-wheel mounted on one ofthese rotating members, a-pin mounted on the other member in such position that the relative movement of the two members will cause the pin to drive the star-wheel, a link pivoted at one end to a member rotated by the star-wheel at a point eccentric to the axis of rotation of said member, arms projecting laterally one from each of the-blades, means for operatively connectingthe other end of the link to one of these arms, and a laminated ring mountedconcentrically with the bladecarrying member and having (perforations in it which receive the aforesaid arms on the blades whereby theyare all interconnested, for the purpose described.

13. Ina ower-driven fan, the combination of a driving-shaft which is rotated con- -tinuously in one direction, a blade-carrying member mounted on an extension of the driving-shaft, the blades being pivoted to turn about axes radial to such member, a friction-device operatively connectin y it with such extension whereby the b ade member is driven but allowed to slip relatively to the extension, and means operated by the relative movement of the drivingshaft and blade-carrying member for oscillating the blades about their pivotal axes to change their angle relatively to the plane of rotationduring running, for the purpose described:

14. In a power-driven fan the combinationof, a driving-shaft which is rotated continuously in one direction, a blade-car rying member mounted concentrically on an,

extension of the drivingshaft which exten- S1011 is provided with a shoulder, means for applying end-thrust to the blade-carrying member against this shoulder, whereby-the tension oftheshaft but slips thereon so that the two partsfdo not rotate at the same speed, the blades, of the fan moreover being so mounted that they can turn about axes radial tothe member whichcarries them, and means for oscillating the blades about these axes to change their angle relatively to the plane of rotation during running,

member is driven by friction from the exoaaeoe extension of the driving-shaft which extension is provided with a shoulder, a spiral spring. surrounding the extension of the driving-shaft, one end of the spring being butted against aortion of the blade-carrying member, adjustable means for apply' ing end-thrust to the other end-of the spring so that the blade-carrying member may be driven by friction from the extension of the driving-shaft but allowed to slip relatively to said extension so that the parts do not rotate at the same speed, the blades of the fan moreover being so mounted that they can turn about axes radial to the member which carries them, and means for oscillating the blades about these axes tochange their angle relatively to the plane of rotation during running,,such means being operated b the relative movement of the driving shat; and blade-carrying member, for the purpose described.

16. In a power-driven fan the combination of, a driving-shaft which is rotated continuously in one direction, a blade-carrying hub mounted concentrically on an extension of the driving-shaft which extension is provided with a shoulder, the interior of the hub being larger than the extension it is mounted upon and having an internal flange at one end which fits the said extension, a spiral spring mounted on the driving-shaft extension within the hub and having one of its ends against the internal flange of the hub, acylindrical thrust-piece on the extension which bears against the other end of the spring and projects beyond the hub and lock-nuts, having screw-threaded engagement with the end of the driving-shaft extension so that they can be advanced along the same to bear against the cylindrical thrust-piece whereby the hub is driven by friction from the extension of the shaft but slips thereon so that the two parts do not rotate at the same speed, the blades of the fan moreover being so mounted that they can turn about axes radial to the member which carries them, and means for oscillatin the blades about these axes] to change their angle relatively to the plane of rotatlon during running, such means being operated by the relative movement of the driving-shaft and blade-carrying member, for the purpose described; In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

HENRY JULIUS TRAUTMANN. JAMES LLOYD COPPING, "Witnesses: HAROLD H, SIMMONS, 

